hexapod
noun
a six-legged arthropod of the class Insecta (formerly Hexapoda); an insect.
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Polypodous: having many feet, and thus, specifically applied to the Myriapoda, and to the larvae of Lepidoptera and saw-flies, in contradistinction to footless and hexapodous larvae.
From Explanation of Terms Used in Entomology by John. B. Smith